Two-dimensional cuprate nanodetector with single telecom photon sensitivity at T = 20 K
Luque Merino, Rafael (Institut de Ciències Fotòniques)
Seifert, Paul (Universität der Bundeswehr München)
Duran Retamal, José (Institut Català de Nanociència i Nanotecnologia)
Mech, Roop K. (Munich Center for Quantum Science and Technology)
Taniguchi, Takashi (National Institute for Materials Science)
Watanabe, Kenji (National Institute for Materials Science)
Kadowaki, Kazuo (University of Tsukuba)
Hadfield, Robert H. (University of Glasgow)
Efetov, Dmitri K. (Munich Center for Quantum Science and Technology)

Date:	2023
Abstract:	Detecting light at the single-photon level is one of the pillars of emergent photonic technologies. This is realized through state-of-the-art superconducting detectors that offer efficient, broadband and fast response. However, the use of low T superconducting thin films limits their operation temperature to approximately 4 K and below. Here, we demonstrate proof-of-concept nanodetectors based on exfoliated, two-dimensional cuprate superconductor BiSrCaCuO that exhibit single-photon sensitivity at telecom wavelength at a record temperature of T = 20 K. These non-optimized devices exhibit a slow ∼ m s reset time and a low detection efficiency (∼ 10 - 4). We realize the elusive prospect of single-photon sensitivity on a high-T nanodetector thanks to a novel approach, combining van der Waals fabrication techniques and a non-invasive nanopatterning based on light ion irradiation. This result paves the way for broader application of single-photon technologies, relaxing the cryogenic constraints for single-photon detection at telecom wavelength.
Grants:	European Commission 820378
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	2D materials, Vol. 10, Núm. 2 (April 2023) , art. 21001, ISSN 2053-1583

DOI: 10.1088/2053-1583/acb4a8

10 p, 1.5 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles